Answer | Crossword Clue |
---|---|
ABELSON | Neptunium discoverer |
neptuniums | NEPTUNIUM, a radioactive metallic chemical element of the lanthanide series |
neptunium | The chemical element of atomic number 93, a radioactive metal of the actinide series. Neptunium was discovered as a product of the bombardment of uranium with neutrons, and occurs only in trace amounts in nature |